package com.ming.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author Xu
 * Created by Intellij IDEA.
 * @create 2021/4/12 20:21
 */
public class LoginHandlerInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws ServletException, IOException {
        // 获取 loginUser 信息进行判断
        Object user = request.getSession().getAttribute("loginUser");
        if (user == null){ // 未登录，返回登录页面
            request.setAttribute("msg","没有权限，请先登录");
            request.getRequestDispatcher("/index.html").forward(request,response);
            return false;
        } else {
            // 登录，放行
            return true;
        }

    }

}
